A patch update to the Shibboleth Service Provider, V2.5.5, is now available.
This release corrects a few reported issues, addresses a security advisory  and in the case of Microsoft Windows, updates a number of libraries included to correct various minor vulnerabilities.
A list of issues addressed  and important changes to note  can be found in our wiki.
Updated Windows installation kits are available  that will update any prior 2.5.x release.
RPM packages are also available now. Please read the notes in  carefully as they describe a number of important changes affecting newer Linux platforms that support systemd.
NOTE especially that due to the transition from SysV init script to systemd unit file on such platforms, it's necessary to re-enable "start on boot" for the shibd daemon with the "systemctl enable shibd" command. (Non-systemd platforms do not require any special care.)